That's an MB-6ish mid-'93 stab at RapidFire shifters before all MBs
converted to them in '94. I learned this when Grant answered my letter
that year enquiring about the quality of my new-to-me Motobecane by
startling me with a phone call (I knew nothing about bikes at the
time). He told me "NB" stood for New Bike or No Brainer, as in "no-
brainer click click shifting".
The price for a plain gauge project is a little high, in my opinion.
Joe Bernard
Fairfield, CA.